/**
 * Created by Administrator on 2016/7/17.
 */
function moveElement(elementID,final_x,final_y,interval){
    if(!document.getElementById)return false;
    if(!document.getElementById(elementID))return false;
    var elem = document.getElementById(elementID);
    var xpos = parseInt(elem.style.left);
    var ypos = parseInt(elem.style.top);
    if(xpos == final_x && ypos == final_y){
        return true;
    }
    if(xpos < final_x){
        xpos++;
    }
    if(xpos > final_x){
        xpos--;
    }
    if(ypos < final_y){
        ypos++;
    }
    if(ypos > final_y){
        ypos--;
    }
    elem.style.left = xpos + "px";
    elem.style.top = ypos + "px";
    var repeat = "moveElement('"+elementID+"','"+final_x+"','"+final_y+"','"+interval+"')";
    movement = setTimeout(repeat,interval);
}